Stovepipe collar mounting for wood



Jan. 3, 1939. G. H SWVEARINGEN, SR 2,142,461

STOVEPIPE COLLAR MOUNTING FOR WOOD HEATERS Filed April 11, 1938 IN VEN TOR.

Patented Jan. 3, 1939 UNITED STATES STOVEPIPE. COLLAR MOUNTING FOR WOOD HEAT ERS

George Hollis Swearingen, Sr., Louisville, Ky., assignor to Louisville Tin and Stove Company, Incorporated, Louisville, Ky.

Application April 11, 1938, Serial No. 201,451

2 Claims.

This invention relates to improvements in Stovepipe collar mountings for sheet iron wood heaters.

Heaters of this type are usually madewith a top which is slightly depressed below its rim edge in order to form at said edge an offset receiving the upper edges of the walls of the body to double seam the top and walls of the body at the rim edge. The top is provided with an opening to receive a collar forming a fitting connection between the stove and the stovepipe connecting the same in use with an outlet flue or chimney. As heretofore generally constructed a flangeless collar opening has been formed in the top of the same diameter as the lower end of the collar which is snugly fitted thereinto, the collar being swaged above its lower edge to form an annular shoulder to rest on the top and hold the collar from dropping down and being flanged at its lower edge outward to engage the underside of the top to hold the collar from upward displacement. The collar thus in effect is formed with an annular groove receiving the edge wall of the opening. As a result the collar thus mounted in position constitutes a fixed part of the stove projecting some distance above the top of the stove.

There are two important objections to this construction and mode of mounting the collar.

One is that when the extreme heat of the wood 30 fire strikes the sheet iron top the metal buckles considerably and this draws the iron away from the collar opening to such an extent as to enlarge the opening to a diameter greater than the swaged shoulder so that the collar drops down 35 into the stove or becomes useless for its purpose. A replacement collar cannot then be provided because the hole is too large for a new one and the stove is therefore rendered useless. The second objection to such usual construction and in mode of mounting a collar is that in shipping a stove it is necessary to use a heavy wood crate enclosing the stove up to the level of the top of the fixed collar and to fill the space between the stove top and top of the crate to such level with packing pads of heavy corrugated fibre. The cost of shipping the stove, because of the size and weight of the crated article and the added packing cost mentioned, is therefore comparatively high.

50 One object of the present invention is toprovide a stove having a top in which a collar receiving opening is so formed as to prevent buckling of the metal and the enlargement of the opening and dropping down of the collar from 55 such cause.

Another object of the invention is to provide a novel formation of the opening and cooperative construction of the collar whereby a detachable and readily replaceable collar may be employed, with advantages in enabling a new collar 5 to be substituted for an old one and in enabling the collar to be stored in the stove in shipment and a more compact and less expensive shipment to be made.

With these and other objects in view, the in- 10 vention consists in the novel features of construction and combination and relationship of parts hereinafter more fully described and claimed, and as shown in the accompanying drawing, in which:

Fig. 1 is a top plan view of a sheet metal wood stove embodying my invention and showing a collar fitted in position.

Fig. 2 is a plan view of a portion of the same with the collar removed.

Fig. 3 is a section on the line 3-3 of Fig. 1. Fig. 4 is a view similar to Fig. 3 with the collar disposed above its receiving opening and in position for application.

Referring now more particularly to the drawing, I represents the body and 2 the top wall of a sheet metal wood stove embodying my invention. This stove may be generally of oval or elliptical form as constructed, and as shown herein, but may be of any other form suitable for the purpose. The top 2 is shown in accordance with general practice as being slightly depressed as a whole below the bevel of the top rim 3 of the stove, in order to allow the marginal edge of the top wall to be swaged to provide a groove receiving the upper edge of the vertical or body wall 4 of the stove and to form a double seam at this point.

In accordance with my invention, the wall 2 is provided at a suitable point with an outlet opening for the discharge of the products of combustion and for the reception of the collar 5 whereby the outlet opening is connected with the smoke pipe 6 leading to a chimney. This collar 5 may be of generally ordinary construction and swaged near its lower end to provide an annular supporting shoulder l and a skirt portion 8 depending from said shoulder. The collar 5 is provided therein with a pivotally mounted or other suitably mounted damper 9 of desired type.

The portion of the top 2 which supports the collar 5 and in which is provided the collar receiving opening is of novelconstruction. To this end, the top 2 is provided with a depressed portion It) in which the opening II is formed and which marginally surrounds said opening. The depressed portion I 0 is further provided with a depressed portion I2 which bounds the opening I I and forms the wall thereof. This depressed portion I2 is in the form of a ring or annulus providing a seat pocket or chamber of such forms as to receive the skirt portion 8 of the collar 5. The depressed Wall or portion I2 is provided at its lower edge with an inwardly extending strengthening and supporting flange I3 providing a seat support for the lower edge of the skirt portion of the collar and a stop limiting the downward movement thereof. When the collar is fitted in position, as shown in Fig. 3, its shoulder I rests upon the depressed portion Ill and its skirt portion 8 projects downwardly into the depressed seat chamber I2 with its lower edge resting on the flange I3 between the wall I2 and inner edge of said flange, thus allowing the collar to easily fit within the depressed receiving chamber without liability of leakage of smoke or gases at the joint.

In practice, the depressed portions I0 and I2 are formed in the top 2 by the action of a combination die which will draw the metal down to a proper depth, after which a portion of the metal in the bottom of the depressed portions is punched out to form the opening and to leave the flange I3 at the bottom of said opening.

E'he result of the construction described is to provide a collar receiving opening in the top 2 lying below the plane of the general level of the top and formed in and by the depressed portions I0 and I2, which opening is surrounded by the depressed portion I2 which forms a seat on which the abutment shoulder I of the collar rests and the portion I2 providing a chamber receiving the skirt portion 8 of the collar which rests on the flange I3. A secure joint is thus formed between the wall of the opening and the collar and the collar is firmly and stably supported in position. The depressed portions I8 and I2 and the flange I3 reinforce the top wall 2 to a maximum extent against distortion or buckling when the extreme heat of the wood fire strikes the top wall and prevent buckling of a character tending to draw the metal away from the collar opening and to increase its diameter to an objectionable extent. On the contrary, by reason of the described construction of the depressed portions the tendency of the metal of the top on becoming heated will be to lessen the diameter of the collar opening. This follows from the fact that the portions I2 and I3 lie at right angles to each other, while the portion I2 lies at right angles to the portions 2 and Ill, so that, as the natural tendency of metal is to straighten out when heated, such tendency will cause the portions I2 and I3 to move inwardly and close about the skirt of the collar. Thus even in the event of the expansion of the portion IE to a degree to enlarge the upper portion of the opening to a diameter larger than the shoulder I under the great heat of the wood fire striking the top 2, the resultant tendency of the portions I2 and I 3 to straighten out will cause them to move inwardly and contract the lower from the manufacturer or dealer and applied for use to keep the stove in serviceable condition.

As the collar is removable and may be packed inside the stove with other parts which are shipped therewith, the stove may be enclosed for shipment within a fibre carton instead of a crate. This avoids the necessity of using pads of heavy corrugated fibre to fill out the difference in height between the stove top and a fixed collar and the use of a heavy wooden crate of greater height than the stove necessary to be employed for packing under such conditions.

The invention thus provides a construction of stove which has longer service life, due to the fact that this top can not become buckled in such manner as to enlarge the collar opening to a diameter to render the collar unserviceable, and. to the fact that a type of collar opening and collar is provided which allows replacement of collars as occasion requires. Furthermore, a

stove is provided which may be packed so as to have less width and occupy less storage space in shipment, and which is less liable to damage during shipment, resulting in economy in the cost of production and distribution.

From the foregoing description, taken in connection with the drawing, the construction, mode of use and advantages of my improved collar mounting will be readily understood and appreciated by those versed in the art without a further and extended description. While the structure disclosed is preferred, it will, of course, be understood that changes in the form, construction and arrangement of parts within the scope of the appended claims may be made, without departing from the spirit or sacrificing any of the advantages of the invention.

What I claim is:

1. In combination, a stove having a top wall provided with a depressed portion formed with an opening therein bounded by said depressed portion, a seat ring formed on and depending from the depressed portion in line with the opening, and a detachable collar having a shoulder to rest on the depressed portion and a skirt portion to fit within the opening and seat ring.

2. In combination, a stove having a top wall provided with a depressed portion formed with an opening therein bounded by said depressed portion, a seat ring formed on and depending from the depressed portion in line with the opening, an inwardly extending flange at the base of said ring, and a detachable collar having a shoulder to rest on the depressed portion and a skirt portion to fit within the opening and seat and engage said flange.

GEORGE HOLLIS SWEARINGEN, SR. 

